Publications Repository - Gdańsk University of Technology

Here, for the first time, we present data on proton conductivity of high-entropy, single-phase perovskites. The BaZr0.2Sn0.2Ti0.2Hf0.2Ce0.2O3−δ, BaZr0.2Sn0.2Ti0.2Hf0.2Y0.2O3−δ, BaZr1/7Sn1/7Ti1/7Hf1/7Ce1/7Nb1/7Y1/7O3−δ, and BaZr0.15Sn0.15Ti0.15Hf0.15Ce0.15Nb0.15Y0.10O3−δ single-phase perovskites were synthesized. Before electrical measurements, materials were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). The following experimental results demonstrated that studied high-entropy perovskites are proton conductors: (1) The observed mass increase upon the switch from dry to wet atmosphere confirmed the water incorporation into materials structure. (2) The electrochemical impedance spectroscopy (EIS) revealed that the total conductivity increased while its activation energy decreased in the presence of water vapor in the atmosphere. (3) The conductivity in atmosphere humidified with H2O and D2O differed one from another, showing typical of proton conductors isotope effect in high-entropy oxides.

Authors

• prof. dr hab. inż. Maria Gazda link open in new tab ,
• dr inż. Tadeusz Miruszewski link open in new tab ,
• Daniel Jaworski link open in new tab ,
• dr hab. inż. Aleksandra Dorota Mielewczyk-Gryń link open in new tab ,
• dr inż. Wojciech Skubida link open in new tab ,
• dr inż. Sebastian Lech Wachowski link open in new tab ,
• dr inż. Piotr Winiarz link open in new tab ,
• dr inż. Kacper Dzierzgowski link open in new tab ,
• dr hab. inż. Marcin Stanisław Łapiński link open in new tab ,
• dr inż. Iga Szpunar link open in new tab ,
• dr inż. Ewa Dzik link open in new tab